GIA Certified Oval Cut Diamonds
The GIA gives consistent and reliable grades for natural diamonds. For fancy shapes like the oval. They issue a grade for color, clarity, polish and symmetry, as well as outlining the diamond’s proportions. They do not issue a grade for cut quality, as the parameters for a beautifully oval cut diamond are much wider than those of a round brilliant.
However, it is important to scrutinise an oval cut diamond. A poor cut can cause ‘the bow tie’ effect in oval diamonds. This is when a dark, bow-tie shaped shadow is cast horizontally across the centre of the diamond.
A table % of 53-63 and a depth % of 58-62 is generally considered optimal for an oval diamond. Remember that our friendly team advise you on cut quality for the trickier, fancy shaped diamonds.
